Pusher-ram stop and support



Dec. 7 1926.

I. D. THOMAS ET AL PUSHER RAM STOP AND SUPPORT Filed Feb. 26, 1926 2 Sheets-Sheet 1 Dec. 7 1926.

l. D. THOMAS AL PUSHER RAM STOP AND SUPPORT 2 Sheets-Sheet 2 Filed Feb. 26. 1926 Patented Dec. 7, 1926.

IVOR n. enemas, or PALMYBA, AND PAUL I-I. nouena's, or CLEVELAND surefire,

OHIO, ASSIGNORS TO THE WELLMAK-SEAVER-MORGAN COMPANY OF CLEVELAND, I

OHIO, A CORPORATION OF OHIO.

rusHEn-nAr/r sror Ann sUrron-r.

Appliation filed February 26,1926. Serial No. 90,940.

This invention relates to pusher rams such as are employed for discharging coke from coke ovens and has for its object to provide a mounting for the ram by which the rear end of the ram is prevented from drifting beyond its support on the ram carriage and dropping down out of alignment with lts support. 7 L

The ram of a coke pusher is supported on rollers and is projected into and retracted from an oven by'means of a motor driving a pinion which meshes with arack on the ram;

In order to prevent over-travel of the ram interengaging stops are provided on the ram and its supporting frame to limit the movement of the ram.

Occasionally, however, the limit switches I fail to function properly and the ram may drift through the stops so that its-rear end runs off the driving pinions and drops down onto the main frame of the machine some distance below. 7 o I It requires a pull of several tons to raise the end of this ram, and since outside means for doing this vwork must be provided, considerahle time elapses, even .under the most favorable conditions, hefore'the ram can be put back in place rea ly for operation. During this time the major portion of theramv is in the oven subjected to a high'tempera-' ture, and any delays, under such circum- 1, stances, not only hold up the operation of the coke plant, but also seriously affect the life of the ram. o J

The present invention provides meansjfor' preventing the rear end of the ram from dropping out of alignment with its runway the event that the ma n stops are broken "and also provides secondary stops for retaining the rear end auxiliary support; 1

The followingdescription and accompany ing drawlngs set forth in detail certain of the rain npon the The -maximum v torque, which the operating motor must develop 1S means embodying the invention, the disclosed means, however, constituting but one of the 'varlous mechanlcal forms in which the principle of the invention maybe em-l ployed. 7 7 References hould be had to the accompanying drawings forminga part of this specification in which Fig. 1 is a side elevation of the pusher ram and the ram support- 1ng members; F g. 2 1s a stop plan view ofthe pusher ram and the ram guldeway;

Fig. 3. is an end elevation of the ram and the ram supporting members looking toward the rear end of the rjamy-Fig. 4. is a frag mentary side elevation showingthe rear end of the ram 1n the position in which it is held by'the secondary stops after it has drifted past the main stops and off the driving.

pinion.

Referring to the accompanying drawings,

the supporting structure indicated by the numeral 1 .1s mounted upon a suitable carriage adapted to travel along the front of a battery ofcoke ovens,but sincethe present' invention concerns only the mounting of the pusher ram, a portion only-of the supporting structure; 1 is shown, A ram 2 is provided witha pusher head 3 of a size but slightly less than that of the interior of the oven chamber-sothat it is adapted to enter the chamber and discharge the coke therefrom as theram iso H erated to pushthe head 3 through the chamher. providedwith a runner l attached to the under sidethereof rearwardlyof thehead 3,

support for the" ram. lThe. ram 2 is sup-c ported in a guidewaywhichis'formed. by

front, rear and intermediate standards 5,

6 and '4, each ofavhich has spacedipostsbetween which the ram 2 15 mounted.

Theram 2 is also The standards 6 and 7 are provided with fiange supporting rollers 8 upo'nfwhich the ra n 2 travels, and thestandard 5 sprovided with a combined supporting roller andpinion 9 which meshes' witha reel; 10; which extends along the under SidfiiOftl); rt11i-2.I" he standards 5 and 7 are also provided with flanged guide rollers 11 which'1engage with 1 the top of theram 2, the supporting and guide rollers forming a guideway-in which the ram travels.

lllllthe runner Lheing adapted to slide along 9 l The ram 2 is reciprocated by means of a suitable electric motor (not shown) which drives the pinion 9, and limit switches 12 and 13 are operated by trip members 14 and '15 pro-jecting' front the side of the ram. 7 When the ram approaches its forward limit of movement the trip member 1 1 engages with the limit switch 12 to cut ofi the current to the driving motor, and when'the ram approaches its rearward'limit of niovr-nnentthe trip member 15 engages with the limit switch 13 to cut off the current to the motor.

In order to prevent the ram from driftin past the forward supporting roller and driving pinion 9, the, supporting standard 51 is provided on opposite sides of the ram with inwardly projecting stop lugs 16 which are engaged by stop lugs '17. attachet.

to the rain adjacent the rear end thereof when the rear'end of the rain comes to a position directly over the pinion 9. Brackets 18 are attached to the standard 5 upon opposite sides of the'ram 2 and project forwardly fronr the standard 5. Horizontally dis posed bars 19 are attached to'the inner faces of the brackets 18 and, at the forward ends of the brackets 18, are attached secondary stop lugs 20, 'At the rear end of the (ram there-are. a tached stop lugs 21 positioned to engage with the secondary stops 20 in the event of failure of the main stops 16 and 17.

Thebars 19 form supporting ledges upon which the stop lugs 21 of the ram are adapted to slide when the rearend of the ram rack haspassed beyond the driving pinion 9, the bars 19 forming auxiliary supports fortherear end of the ram after the ram has drifted past the main stop 16.

In the normal operation of the ram,'the

driving motor is stopped and the motor brake apphed by the operator reversing the controller or by actuation of the limit switches prior to the engagement oftho main stops 16 and 17 so that the main stops are ordinarily not subjected to excessive strain. If the limit switches should fail to function properly, the stop lugs '17 might be driven with greatforce against the stop lugs 16 causing the'lugsto break and the rear end of the ram to drift past" the driving pinion 9. 1n this event the rear end of the ramis supported by the stoplugs -21 sliding along the supporting bars 19and the ram will be brought to a stop by engagerment of-theseoondary stops 20 and 21. 7 in order to withdraw the ram from the oven it is only necessary to pull the ram baclreuntil the rack '10 is reengaged withthe pinion 9 and to operatethe'motor to retract the ram.

[Having described our invention what we claim-is:

"lfln a device of the character described, a pusher ram, a support having a guideway in which the ram iis-slidably supported,

means for moving the ram back and forth by the brackets with'whioh the second 1; 7 stop members of the rain'a-re adapted to en means for moving the rain back and forth in the guidewayfmain and secondary stop members secured to the ram adjacent he rear end thereof, a mainstop member can by the support-adj acent the end of the guideway in the path'of movement of the main stop member on the ram, ant secondary members carried by thesJtppor-t in the th of movement of the secondary stop meof the ram, said secondary stop 1118111l)() being engageable to stop the ram 1n the event of-fai'lure of the main stop members.

3. In a device ofthe character described, a pusher ram, a support havinga-guideway in which the ram is slidably supported,

' means for moving theram back and forth in the guideway, stopmembers on the ram and support for preventing the rear end of the ram from drifting past the forward end of the guideway, secondary stop members projecting from opposite sides of the ram at the rearend thereof,braelrets carried by the support and extending on opposite sides fthe ram in advance of the guideway, s portingiledges carried by th brackets u c which the secondary stops of the raina e adapted to slide, and stop members carr ed gage in the event of failure of the first men-- tioned stops. i

4.111 a device of the character described, a pusher ram having a rack on the under side thereof, a suppo-rtyhaving a. guideay in which the ramis slidably supporte pinion meshing with said-rack, coperating stop members carried by the support at the V forward end of the guideway and the re 1 adjacent the rear end thereof to stop said ram before the rack passes oif of'saidpinien, auXiliLry supporting members carried by the support forwardly ofsaid pinion and b the ram adjacent the rear end thereof for slidably supporting the ram with theracir forwardly of the pinion, and secondary stops on the support and ram for preventing the rear-end of the ram from drifting on" of the auxiliary supporting members.

In testimony whereof, we hereunto our signatures. r

' IVOR VDQTHQMAS.

PAUL H. DOUGLAS. 

